import { asyncRoutes, constantRoutes } from '@/router'
import { getInfo } from '@/api/user'
import { getToken } from '@/utils/auth'
import Layout from '@/layout'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * 后台查询的菜单数据拼装成路由格式的数据
 * @param routes
 */
export function generaMenu(routes, data) {
  // console.log(data)
  data.forEach(item => {
    const menu = {
      path: item.per_menu_path,
      component: item.per_component === 'Layout' ? Layout : loadView(item.per_component),
      // hidden: true,
      children: [],
      name: item.per_menu_name,
      meta: item.meta
    }
    if (item.children) {
      generaMenu(menu.children, item.children)
    }
    routes.push(menu)
  })
  // console.log(routes)
}

export const loadView = (view) => {
  return (resolve) => require([`@/views/${view}`], resolve)
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      // let accessedRoutes
      const loadMenuData = []
      getInfo(getToken()).then(response => {
        let data = response
        if (response.code === -1) {
          this.$message({
            message: '菜单数据加载异常',
            type: 'error'
          })
        } else {
          data = response.data
          Object.assign(loadMenuData, data)
          generaMenu(asyncRoutes, loadMenuData[0]['roles'])
          // let accessedRoutes
          // if (roles.roles.includes('admin')) {
          //   // alert(JSON.stringify(asyncRoutes))
          //   accessedRoutes = asyncRoutes || []
          // } else {
          const accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
          // }
          commit('SET_ROUTES', accessedRoutes)
          resolve(accessedRoutes)
        }
      })
      // const new_role = roles.roles
      // if (new_role.includes('admin')) {
      //   accessedRoutes = asyncRoutes || []
      // } else {
      //   accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      // }
      // commit('SET_ROUTES', accessedRoutes)
      // resolve(accessedRoutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
